A Brief History of Photography

As camera technology continues to advance at stomach-churning speed, it might be wise to remind ourselves of just how far we’ve come, as it’s so easy to get caught up in the never-ending lust for the next shiny new toy. Sometimes, our focus on processors and edge-to-edge sharpness make us forget about the art, the craft, and the photographers that came before us, so sit back and enjoy this short hop through the history of photography.

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Confusion at the Border: Photography Versus Astronomy

One of the biggest confusions that you might notice as you venture into astrophotography is that photographers and astronomers measure their equipment differently. Photographers tend to refer to their lenses in terms of their focal length, while astronomers refer to their telescopes by the diameter of their opening. Thus, a 75mm f/6 telescope has a focal length of 450mm. Meanwhile, a 75mm camera lens at f/6 has an aperture of 12.5mm. If a photographer is told that someone is shooting a 155mm lens hand-held, it would not raise an eyebrow, but an astronomer told the same thing would be incredulous! I can only barely lift my 155mm telescope onto its mount!

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A Constellation Astrophotography Project

Fall tends to be a “transitional” season for the astrophotographer. Summer constellations are still visible for early evening, but are quickly fading into the sunset. Late in the evening, some of the prominent Winter constellations are starting to come into view. In a few months these winter constellations will be high in the sky and well placed for astrophotography, so now is the time to do some planning.

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